Tensioning device for shade-rollers.



J. ,A. WOOTON.

TENSIONING DEVICE FOR SHADE ROLLERS.

APPLICATION FILED FEB.8,1912.

1,091,103, Patented Mar. 24, 191 i /5 /9 M r g Z5 Z4 /fa JOHN A.woo'ron, or Foia'r MEADE, FLORIDA.

TENSIONIN G DEVICE FOR SHADE-ROLLERS.

Specification of Letters Patent.

Patented Mar. 24, 1914.

Application filed February 8, 1912. Serial No. 676,209.

To all whom it may concern Be it known that I, JOHN A. WooroN, a citizenof the United States, residing at Fort Meade, in the county of Polk,State of Florida, have invented certain new and useful Improvements inTensioning Devices for Shade-Rollers; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to new and useful improvements in tensioningdevices for shade rollers.

An object of this invention is the provision of a tensioning device forshade rollers which is of such construction that the cus tomary curtainsprings can be dispensed with.

Another object of this invention is the provision of means whereby ashade roller may be rotated for the purpose of winding or unwinding theshade thereon, and means for tensioning the said roller whereby the samewill be held against rotation thereby retaining the shade in itsadjusted positions.

A still further object of this invention is to improve and simplifydevices of this character, rendering them comparatively simple andinexpensive to manufacture, reliable and eflicient in use and readilyoperated.

With the above and other objects in view, this invention resides in thenovel features of construction, formations, combinations andarrangements of parts to be hereinafter more fully described, claimedand illustrated in the accompanying drawing, in which:

Figure 1 is a front elevation of a window frame having a shade rollermounted thereon with my invention applied to the latter. Fig. 2 is avertical transverse sectional view taken on the line 22 of Fig. 1, andFig. 3 is a similar view taken on the line 33 of Fig. 1.

Referring to the accompanying drawing by similar characters of referencethroughout the several views, the numerallO designates generally aportion of a window frame which is provided at its opposite sides withthe usual shade brackets 11 in which is journaled a shade roller 12which supports the customary curtain or shade 13.

The roller 12, at one end, is somewhat reduced as shown at 12 to producea circumscribing flange 15, and the roller is then further reduced toprovide an extensionl2, as shown in Fig. 3. A grooved pulley 24, iskeyed upon the reduced portion 12 of the roller 12, lying against theshoulder formed by the end of the reduced portion 12*, and thus inspaced relation to the shoulder 15, forming a circumscribing groove 15,in which is normally located the arcual arm 16 formed upon the forwardend of a shank 17 which extends laterally from the supporting plate 18attached in any suitable manner to a convenient portion of the windowframe 10.

An arcual arm 19 is pivotally connected as indicated by the numeral 20at its inner end to the inner end of the arm 16 and is located invertical movement within the circular groove 15 to and from the beforementioned arm 16 to frictionally engage the shade roller 12 for thepurpose of retarding its rotary movement and retaining the shade 13 inits various adjusted positions.

A shank 21 extends rearwardly from the arm 19 adjacent its pivotal pointand is adapted to lie in registration with the shank 17. The shank 21 isprovided with a vertically disposed threaded opening 22 in which islocated a threaded pin 23 arranged for engagement with the shank 17providing a means whereby upon the rotation of this pin 23 the arcualarm 19 will be moved to and from engagement with the arm 16 for frictionengagement with the shade roller.

The grooved pulley 24 has extending from the oppositesides of its groove25 a plurality of interlocking teeth 26, the said teeth 26 upon eachside of the groove extending between the teeth. formed upon theoppositeside thereof, and further being arranged to engage an endlesscable 27 for the purpose of preventing the same from slipping.

The opposite lap of the cable 27 passes over a similar pulley 28 whichcan be rotated through the medium of a crank 29 or otherwise to adjustthe shade 13 to its various positions.

The curtain 13 may be operated by means of the usual finger grip 30.

From the foregoing disclosures taken in connection with the accompanyingdrawing, it will be manifest that a tensioning means of the naturedescribed is provided for which will fulfil all of the necessaryrequirements of such a device.

It should be understood in this connection that various minor changes inthe details of construction may be resorted to within the scope of theappended claim Without departing from or sacrificing any of theadvantages of the invention.

Having thus fully described this invention what I claim as new anddesire to protect by Letters Patent, is:

The combination with a shade roller having a slightly reduced portion atone end, and a further reduced portion beyond the slightly reducedportion, of a tortuously grooved pulley engaged with the secondmentionedreduced portion and lying against the first-mentioned reduced portion,said pulley being of greater size than the first-mentioned reducedportion, to form a circumscribmg groove between the pulley and the mainportion of the shade roller,

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C."

